Overview
The OPA2189IDGKR is a dual, 14MHz, MUX-friendly, low-noise, zero-drift, CMOS precision operational amplifier produced by Texas Instruments. This device is part of the OPAx189 series, known for its ultra-high precision and excellent dynamic performance. It features a unique MUX-friendly input architecture, which prevents inrush current when applying large input differential voltages, thereby improving settling performance in multichannel systems. The OPA2189IDGKR is designed for a wide range of precision instrumentation, signal measurement, and active filtering applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Architecture | CMOS | |
| Number of Channels | 2 | |
| Gain Bandwidth (Typ) | 14 | MHz |
| Slew Rate (Typ) | 20 | V/μs |
| Input Bias Current (Typ) | 70 | pA |
| Input Bias Current (Max) | 300 | pA |
| Offset Voltage (Max) | 0.005 | mV |
| Offset Drift (Typ) | 0.006 | μV/°C |
| Common Mode Rejection Ratio (CMRR) (Typ) | 168 | dB |
| Operating Temperature Range | -40 to 125 | °C |
| Total Supply Voltage (Min) | 4.5 | V |
| Total Supply Voltage (Max) | 36 | V |
| Output Current (Typ) | 65 | mA |
| Noise at 1 kHz (Typ) | 5.2 | nV/√Hz |
| Package Type | VSSOP-8 | |
| Pin Count | 8 |
Key Features
- Ultra-High Precision: Zero-drift of 0.005 μV/°C and ultra-low offset voltage of 3 μV maximum.
- Low Noise: 5.2 nV/√Hz at 1 kHz and 0.1-Hz to 10-Hz noise of 0.1 µVPP.
- Excellent Dynamic Performance: Gain bandwidth of 14 MHz, slew rate of 20 V/μs, and fast settling time of 0.01% in 1.1 µs for a 10-V step.
- MUX-Friendly Inputs: Prevents inrush current when applying large input differential voltages, improving settling performance in multichannel systems.
- Robust Design: EMI/RFI filtered inputs and robust ESD protection during shipment, handling, and assembly.
- Wide Supply Range: Operates from 4.5 V to 36 V, making it versatile for various applications.
- Rail-to-Rail Output: Output swing includes both the negative and positive supply rails.
- Low Quiescent Current: Maximum quiescent current of 1.7 mA per channel).
Applications
- Battery Test: Suitable for precise voltage measurements in battery testing applications).
- Analog Input Module: Used in analog input modules for high-precision signal processing).
- Weigh Scale: Ideal for weigh scale applications requiring high accuracy and stability).
- DC Power Supply, AC Source, Electronic Load: Utilized in power supply and electronic load systems for precise voltage regulation and measurement).
- Multifunction Relay: Employed in multifunction relay systems for reliable and precise signal handling).
- Precision Instrumentation: Suitable for various precision instrumentation applications, including signal measurement and active filtering).
Q & A
- What is the gain bandwidth of the OPA2189IDGKR?
The gain bandwidth of the OPA2189IDGKR is 14 MHz).
- What is the typical slew rate of the OPA2189IDGKR?
The typical slew rate is 20 V/μs).
- What is the input bias current of the OPA2189IDGKR?
The typical input bias current is 70 pA, with a maximum of 300 pA).
- What is the offset voltage drift of the OPA2189IDGKR?
The offset voltage drift is 0.006 μV/°C).
- What is the common mode rejection ratio (CMRR) of the OPA2189IDGKR?
The typical CMRR is 168 dB).
- What is the operating temperature range of the OPA2189IDGKR?
The operating temperature range is from -40°C to 125°C).
- What is the total supply voltage range for the OPA2189IDGKR?
The total supply voltage range is from 4.5 V to 36 V).
- What is the noise level at 1 kHz for the OPA2189IDGKR?
The noise level at 1 kHz is 5.2 nV/√Hz).
- What package type is the OPA2189IDGKR available in?
The OPA2189IDGKR is available in an 8-pin VSSOP package).
- What are some typical applications of the OPA2189IDGKR?
Typical applications include battery test, analog input modules, weigh scales, DC power supplies, AC sources, electronic loads, and multifunction relays).
